Effect of vibratory weld conditioning on valve residual stress and fracture toughness

被引：0
|
作者：
Lu, Qinghua [1 ]
Chen, Ligong [1 ]
Ni, Chunzhen [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
来源：
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING AND MECHANICS 2007, VOLS 1 AND 2 | 2007年
关键词：
vibratory weld conditioning; residual stress; fracture toughness;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In the present work the effects of vibratory weld conditioning (VWC) on residual stress and fracture toughness of full welded valve have been investigated. The experiment results show that vibration reduces residual deformation and stress generally. Fracture test is carried out using single edge notch bend (SENB) specimens. The fracture surfaces of failed weld metal (WM) specimens are characterized by dimple-like structures. The depth and density of these dimples increase with vibration applied in welding. While the fracture characteristic of the heat-affected zone (HAZ) is river marking, indicating brittle fracture mode. The possible solidification behaviour in VWC is discussed in this paper.
引用
收藏
页码：1044 / 1048
页数：5
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